Extron electronics SI 28 Manuale utente

User’s Guide

Surface Mount Speakers

68-1164-01

Rev. A

11 06

SI 26 and SI 28

SI 26 and SI 28 Speakers • Packaging

Packaging Information

Part No.

XXX-XXX-01

Install 206W Ceiling Speaker

33-XXXX-01REV.

Thick Single Wall

Packing

Bottom Foam

Speakers

(each plastic

wrapped)

Allen Hex Tool

(plastic wrapped)

Top Foam

Product Label

Wall Mount

Assemblies

Figure 1 — SI 26 and SI 28 speaker packaging details

SI 26 and SI 28 Speakers • Introduction 1

About the SI 26 and SI 28 Speakers

The Extron System INTEGRATOR®SI 26 and SI 28 two-way surface

mount speakers are ideally suited for classrooms, conference

rooms, and boardrooms. With a weather resistant construction,

they are also suitable for outdoor environments.

• SI 26 features a 6.5" long-throw woofer, 1" tweeter, 150 watts

continuous program capacity, and frequency response from

70 Hz to 20 kHz.

• SI 28 features an 8" long-throw woofer, 1" tweeter, 180 watts

continuous program capacity, and frequency response from

50 Hz to 20 kHz.

Figure 2 — Extron SI surface speakers

NReferring to packaging information for location,

carefully remove and check contents before installation.

NExtron recommends that the wiring installation is

performed by a professional audio equipment installer.

CUse cable clamps to hold the cables in place for

strain relief. Trim back/insulate exposed cable

shields with heat shrink to reduce the chance of

short circuits.

NFor Troubleshooting Tips see pages 10 and 11.

NFor Service Access see page 10.

Introduction

SI 26 and SI 28 Speakers • Features

Features

Dimensions: SI 26: 13.0" H x 8.5" W x 6.75" D

(33.0 cm H x 21.6 cm W x 17.1 cm D)

SI 28: 16.5" H x 11.5" W x 8.6" D

(41.9 cm H x 29.2 cm W x 21.9 cm D)

aDual tuned bass reﬂex ports

b1" ferroﬂuid-cooled, aluminum dome tweeter

cFront locking access (allows for speaker position adjustment)

d6.5" (SI 26) or 8" (SI 28) long-throw woofer

eGrill and enclosure may be painted to match environment

fWeather resistant construction

gPush down spring terminals

hWall mount assembly with unique V-Lock™ (Patent Pending)

system included

iBack cover for use when speakers are not wall mounted

jAllen hex tool

kExtron logo (ﬁts in grill to cover locking port access)

lFront grill retaining screws (2)

• 8 ohm nominal impedance

• 75 watts (SI 26) or 90 watts (SI 28) continuous pink noise

• 150 watts (SI 26) or 180 watts (SI 28) continuous program

• Internal driver overload protection circuit

Figure 3 — Speaker Features

Installation

Installing the SI 26 or SI 28 Speaker

The SI 26 or SI 28 can be mounted on a surface, such as a wall

or post, or mounted in a bookcase, or under a shelf, and can be

used with any Extron product with power amps.

Conference Room

Extron

SI 28

Surface-mount Speakers

Figure 4 — Surface speaker application

Desk top or bookshelf applications

1. For quick installation on a desk top or bookshelf, simply

place on a desk, shelf or other ﬂat surfaces as desired.

2. Route the speaker wire (Extron recommends using

12-18 AWG) to the speakers.

3. Strip the wire and connect the speakers as described in

"Wiring the SI 26 and 28 speakers" on page 8.

Wall mounting applications

Installing the wall mount assembly

NBefore starting installation ensure that the wall and wall

material is capable of supporting the combined weight of

the speakers and the wall mount assemblies.

1. If mounting to drywall, use a stud locator to locate the

studs in the wall. Mark their position.

2. Remove the wall mount assembly from the box and

loosen the hex cap screw (turning it counter clockwise)

with the allen hex tool supplied. Rotate the front section

approximately 90 degrees to the rear mounting plate, as

SI 26 and SI 28 Speakers • Installation

4SI 26 and SI 28 Speakers • Installation

Installation, cont’d

shown in ﬁgure 5 and tighten the hex cap screw to lock

the plate in position. This makes the next steps easier to

perform.

Fasten the

wall mount plate

to the vertical

surface (see step 7).

Rotate this

section 90°.

Figure 5 — Rotate and mount the wall mount

assembly

3. Mark the location of the wall mount plate's three primary

mounting holes on the stud line, and drill pilot holes.

NFor some surfaces the four alternative pilot dimples

(see ﬁgure 6) may be used to secure the assembly in

place. Mark and drill as appropriate.

Alternative

Pilot Dimples

Alternative

Pilot Dimples

Primary

Mounting

Holes

Figure 6 — Mounting hole locations on the speaker

bracket

4. Mark the wall where the wire will pass through the plate,

and cut a small access hole large enough for the wire to

pass through without snagging. If the stud is wider than

the plates access hole, then cut the hole in the wall to the

left or right and directly alongside the stud (see ﬁgure 7).

NBefore cutting it, make sure the plate will hide the

proposed area of the hole after installation.

Cut access

hole alongside

stud and feed

wires though

hole.

Wall Stud

Wall Mount Assembly

Wall

Approximate Stud

line Behind Wall

Bend wire to line

up with access

hole in plate.

Hex Cap

Screw

Figure 7 — Install wall mount assembly

NExtron recommends that the wiring installation be

performed by a professional audio equipment installer.

5. Using compatible speaker wire (Extron recommends using

12-18 AWG), route the wire from the audio source to the SI

speaker location by the most convenient and safe route. If

the wiring is to remain hidden behind the wall, follow the

stud to where the small access hole has been cut, and feed

about two feet of wire out through the hole into the room.

If necessary, bend the wire to align with the plate (see

ﬁgure 7). Secure the wire to the stud at various places, but

allow enough freedom of movement near to the hole for

connection to the speaker.

6. Pull sufficient wire up through the holes in the rear plate

(see figure 8) to allow ease of connection to the speaker

after installation.

N Do not strip and connect the wire at this time.

Pass the wires

through the plate

access hole.

Figure 8 — Pass the wire through the plate

SI 26 and SI 28 Speakers • Installation

Installation, cont’d

6SI 26 and SI 28 Speakers • Installation

7. Place the wall mount assembly against the wall, aligning

the plate holes with those drilled, and secure with

appropriate hardware (see ﬁgure 5), using a powered

screwdriver with an appropriate screw bit.

8. When the assembly is securely in place, loosen the hex

cap screw (turn counter-clockwise) and rotate the front

section back into a vertical position with the hex cap screw

at the top. Using the allen hex tool, turn the hex cap screw

clockwise to tighten.

9. Repeat steps 1through 8for the second assembly mount.

Preparing the speaker for mounting

1. Remove the cover from the back of a speaker by pulling

the two attached tape tabs towards you and lifting the

cover away.

NIf the tape has been removed previously, carefully insert

a ﬂat bladed screwdriver to loosen the two lower locking

tabs ﬁrst, then one or more of the top tabs. Take care not

to crack or chip the cover, or break off the locking tabs.

Lift away the cover as it comes free.

Pull tape

here...

...and lift away rear cover.

Figure 9 — Pull tape and lift away the rear cover

2. At this point connect an optional seismic safety cable (not

supplied) to the rear of the speaker by looping it through

the hole on the box bracket and securing (see ﬁgure 10).

Anchor the other end to a suitable secure point above the

speaker wall assembly mount.

CThe safety cable should be of sufﬁcient strength

to support the full weight of the speaker and wall

mount assembly combined.

NEnsure that the cable is long enough to allow you to

connect the speaker wires and to manipulate the speaker

into position on the assembly mount.

Seismic Safety Cable

Attach line here

and secure.

Anchor this end to a

suitable secure point.

Figure 10 — Attach a seismic safety cable to the rear

of the speaker

Mounting the SI 26 speaker onto the wall mount assembly

3. Carefully lift the speaker above the wall mount assembly

and gently slide the speaker box bracket down into the V

lock groove (see ﬁgure 11) until it locks into place.

Figure 11 — Slide the speaker down onto the wall

mount assembly

4. Repeat steps 1 through 3 for the second speaker, then

proceed to "Wiring the SI 26 and 28 speakers" section on

page 8.

Mounting the SI 28 speaker onto the wall mount assembly

3a. Carefully lift the speaker up as close to the bottom of the

wall mount assembly as possible and hook the right outer

edge of the speaker box bracket over the right inner edge of

the V-lock groove (see ﬁgure 12).

NHolding the speaker so that the lowest part of the speaker

is as close to the bottom of the V-lock groove as possible

makes it easier to hook the two parts together.

Lift the speaker up to the

wall mount assembly....

V Lock

Groove

Box

Bracket

V Lock

Groove

Box

Bracket

...and slide it down

into the V-lock groove.

SI 26 and SI 28 Speakers • Installation 7

8SI 26 and SI 28 Speakers • Installation

Installation, cont’d

Figure 12 — Hook the speaker over the edges of

the V-lock groove on the wall mount assembly

3b. Rotate the speaker until the speaker box bracket left edge

hooks over the left edge of the V-lock groove (see above).

3c. When the bracket is securely over the V-lock groove, gently

slide the speaker down until it locks into place.

4. Repeat steps 3a to 3c for the second SI 28 speaker.

Wiring the SI 26 and 28 speakers

1. When both speakers are in place, carefully pull enough

speaker wire to reach up to the terminals at the back of the

each speaker and strip the ends of the wire approximately

5/8"(15 mm). Twist the bared

strands so that they hold ﬁrmly in

the connector.

2. Press down on the spring loaded

terminals to open the holes at the

top. Observing the correct polarity, (,wire to ,terminal

and .wire to .terminal) insert the twisted wires into

the relevant open holes (see ﬁgure 13) and release the

springs to secure. Push any loose wire through the wall

mount assembly and back into the wall.

CDo not connect the speaker terminals to one channel

in parallel (together) with those of the other channel.

Figure 13 — Insert wiring into the terminals

V Lock

Groove Box

Bracket

Lift the speaker to the

wall mount assembly,

keeping it as low as

possible.

V Lock

Groove

Hook this

side first.

Box

Bracket

Box

Bracket

V Lock

Groove

Step 3a

Step 3b

Top View

Swivel and

hook this

side second.

Twist the bared wire

Strip approx. 15 mm (5/8")

Push down on the spring terminals

at the back of the speaker, and insert

the wires. Release the springs to secure.

INPUT

Extron

Positive Wire

Negative

Wire

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